Projectile



Aug. 21, 1923..

H. JAcoB PROJECTILE Filed Ah 30 Inventori Patented Aug. 21, 1923.

UNITED STATES PATENT QFFi....;

' HEINRICH JACOB, OF FRIEDENAU, GERMANY, ASSIGNOR TO THE FIRM F OPTISCHE ANSTALT C. P. GOERZ AKTIENGESELLSCHAFT, OF FBIEDENAU, NEAR BERLIN,

GERMANY.

PROJECTILE.

Application filed August 30, 1921. Serial No. 496,954.

(GRANTED UNDER THE PROVISIONS OF THE ACT OF MARCH 3, 1921, 41 STAT. L, 1313.)

To all whom it may concern.

Be it known that I, l IIZINRICH JAoon, a citizen of the German Republic, and resident; of Friedenau, near Berlin, Germany, have invented certain new and useful Improve ments in and Relating to Projectiles (for which I have filed applications for patents as follows: Germany, Feb. 4, 1916; Austria, Mar. 30, 1917; Hungary, Apr. 12, 1917:

' Sweden, July 23, 1919; Denmark, July 26,

1919; Czechoslovakia, Feb. 6, 1920), of

which the following is a specification.

This invention relates to projectiles designed for being thrown off from elevated positions particularly from aircrafts and consists in a novel construction of projectiles of this kind which allows safe handling. For this purpose the projectile is provided with a fuse which, normally set to safety, is set to action by a centrifugally operated device which is under the control of a rotatable shaft carrying a propeller or air screw.

A projectile constructed in accordance with this invention is illustrated in axial section on the accompanying drawing.

The projectile as. a whole is designated wit-h the numeral 1; 2 is the fuse, 3 the striker or igniting pin, 4 a striker supporting spring, 5 a percussion cap, (3 a priming charge. 7 the exploding charge, 8 .s a hollow steering tail piece of the projectile containing the safety device with exception of the actuating propeller 9. The centrifugal regulator is designated 10, its centrifugally operated arms are connected by a tensioned spring 11 andprovided with balls 12, 13. The striker 3 is suspended on inwardly turned portions 14, 15 of the regulator arms by means of aknob provided on a rod member 16 of the striker. 17 and 18 are steering wings at the rear end of the projectile and 19 an arched frame.

The operation is as follows:

During the downfall of the projectile the propeller 9 is quickly brought to comparatively high rotating velocity; this is due to the fact that no big mass is connected with the propeller but only the light centrifugal regulator. Therefore, the balls 12, 13 of the regulator are quickly swung out, although, owing to the action of spring 11, only when the propeller has reached a comparatively high velocity, and the fuse set to action. On the other hand the projectile can quite safely be handled. No rolling transportation of the projectile will be able to cause the centrifugal regulator to Swing out and the arched frame 19 prevents quick rotation of the propeller 9 by hand. Therefore, only on account of a free fall of the projectile a setting of the fuse to action can take place. Regarding the safety of the projectile it is a remarkable point that the centrifugal regulator even after having swung out returns to rest position with the effect of resetting the fuse to safety it for some reason the projectile has not been exploded.

What I claim is 1. In a projectile designed for being thrown off from elevated positions particularly from an aircraft, a fuse normally set to safety and adapted to be set to action by a centrifugally operated device and a prd peller adapted to be actuated by the air during the downfall of the projectile in operatlve connection with said centrifugally op erated device. i

2. In a projectile designed for being thrown off from elevated positions particle larly from an aircraft, a fuse normally set; to safety and adapted to be set to action by a centrifugally operated device working 'un; der and against spring tension, and a propeller adapted to be actuated by the air during the downfall of the projectile in operative connection with said centrifugally operated device, the spring tension acting on the centrifugal device preventing premature setting to action of the fuse at X'UfdlflVt, velocities of the propeller possible under conditions different from the free fall at the projectile through the air.

3. In a projectile designed for being thrown off from elevated positions particularly from an aircraft, a fuse normally set to safety and adapted to be set to action by a centrifugally operated device mounted within a hollow steering extension of the projectile, and a propeller adapted to be actuated by the air during the downfall of the projectile in operative connection with said centrifugally operated device.

4. In a projectile designed for being thrown off from an elevated position par ticularl from an aircraft, a fuse, a centrifuga 1y operated device mounted Within a hollow steering extension of the projectile cooperating with said fuse so as to normally set it to safety, a propeller working in the air in operative connection with said centrifugally operated device adapted to operate it and to set the fuse to action and steering surfaces provided at the propeller end of the projectile and connected with an arched 10 frame member.

In testimony whereof I have signed this specification in the presence of two sub scribing witnesses. V 1

HEINRICH JACOB. Witnesses:

HERMANN REIsING, JULES HUMBRECHT. 

